The average of ten numbers is 6.5. If 0.5 is added to
first four numbers and 0.3 is added to last six
numbers, find the new average.
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Answer:
total sum of 10 number=6.5*10=65
.5 added to first four number =.5*4=2
.3 is added to last six number=.3*6=1.8
new total sum =65+2+1.8=68.8
new mean=68.8/10=6.88
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